Dynamics and Vibration Analysis of a Rotor-Bearing System in a Turbofan Engine with Emphasis on Bearings Modeling

Authors

  • Hossein Rahmani Department of Mechanical Engineering, IHU University, Tehran, Iran
  • Mohammadreza Elhami Department of Mechanical Engineering, IHU University, Tehran, Iran
  • Amin Moslemi Petrudi Department of Mechanical Engineering, IHU University, Tehran, Iran https://orcid.org/0000-0002-5928-0479

DOI:

https://doi.org/10.13052/ejcm2642-2085.3125

Keywords:

Vibration, shaft modeling, turbofan engine, natural frequency, mood shape

Abstract

In this research, while investigating the vibration analysis of rotary axes, we specifically investigate the rotor of a turbofan engine used in the industry. The features of this rotor range are high-performance, lightweight, and low-vibration range. These three factors are in contradiction with each other, resulting in a thorough examination of the total vibration of the complete turbofan rotor. To achieve this, various parameters such as the concentration of properties, rotational inertia, gyroscopic torque, rotational loading, effects of unbalanced mass, crevillous effects, bearing flexibility, etc. have been studied in modeling. The rotor’s natural frequencies, along with the critical velocity, are plotted as well as the shape of its modes. The software is required to perform the computations written by Ansys software and after ensuring its accuracy.

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Author Biographies

Hossein Rahmani, Department of Mechanical Engineering, IHU University, Tehran, Iran

Hossein Rahmani received his B.Sc. in the Shahid Bahonar University of Kerman and M.Sc degrees in Mechanical Engineering from IHU University, Tehran, Iran. He has written numerous educational, research, and administrative records in his career. He is also capable and interested in research, Rotor dynamic, numerical simulation, and vibrational analysis.

Mohammadreza Elhami, Department of Mechanical Engineering, IHU University, Tehran, Iran

Mohammadreza Elhami received a Ph.D. degree in Mechanical Engineering from the University of Liverpool. Now he works as an Associate Professor at the school of mechanical engineering, IHU University, tehran, Iran. His research interests include vibrational and dynamic analysis.

Amin Moslemi Petrudi, Department of Mechanical Engineering, IHU University, Tehran, Iran

Amin Moslemi Petrudi received his B.Sc. in Automobile Engineering from Allameh Amini University and M.Sc degrees in Mechanical Engineering from IHU University, Tehran, Iran. He has written numerous educational, research, and administrative records in his career. He is also capable and interested in research, design, modeling and simulation, impact and penetration mechanics, and stress analysis.

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Published

2022-08-20

How to Cite

Rahmani, H. ., Elhami, M. ., & Petrudi, A. M. . (2022). Dynamics and Vibration Analysis of a Rotor-Bearing System in a Turbofan Engine with Emphasis on Bearings Modeling. European Journal of Computational Mechanics, 31(02), 275–318. https://doi.org/10.13052/ejcm2642-2085.3125

Issue

2022: Vol 31 Iss 2

Section

Dynamics of Structures and Vibrations